Apparatus and method for manufacturing multilayer electrode

Patent metadata

Field	Value
Publication number	US-2018043672-A1
Application number	US-201715670618-A
Country	US
Kind code	A1
Filing date	Aug 7, 2017
Priority date	Aug 12, 2016
Publication date	Feb 15, 2018
Grant date	—

Abstract

An apparatus includes a control device for a first suction portion, a second suction portion, and a folding portion so that each time a separator is folded, a positive electrode and a negative electrode are alternately sandwiched between folded surfaces of the separator. The control device controls the at least one of the first suction portion and the second suction portion so that doping foil is bonded to one of a current collector, the positive electrode, and the negative electrode sucked and held by the at least one of the first suction portion and the second suction portion. The control device controls the at least one of the first suction portion and the second suction portion so that the one of the current collector, the positive electrode, and the negative electrode having the lithium metal foil bonded thereto is transported and sandwiched between a predetermined pair of the folded surfaces of the separator.

First claim

What is claimed is:

1 . An apparatus for manufacturing a multilayer electrode, the apparatus comprising:
a first suction portion having a suction surface for sucking and holding a sheetlike positive electrode, the first suction portion movable in a direction parallel to the suction surface of the first suction portion; a second suction portion located beside the first suction portion in a direction parallel to the suction surface of the first suction portion and having a suction surface for sucking and holding a sheetlike negative electrode, the second suction portion movable in a direction parallel to the suction surface of the second suction portion; a folding portion for folding a tapelike separator; and a control device for controlling operation of the first suction portion, the second suction portion, and the folding portion, wherein the control device includes a sandwiching control portion, a doping foil bonding control portion, and a doping foil sandwiching control portion, the sandwiching control portion controls the operation of the first suction portion, the second suction portion, and the folding portion so that each time the separator is folded, the positive electrode and the negative electrode are alternately sandwiched between folded surfaces of the separator, the doping foil bonding control portion controls the operation of at least one of the first suction portion and the second suction portion so that doping foil is bonded to one of a current collector for doping, the positive electrode, and the negative electrode, the one of the current collector, the positive electrode, and the negative electrode being sucked and held by the at least one of the first suction portion and the second suction portion, and the doping foil sandwiching control portion controls the at least one of the first suction portion and the second suction portion so that the one of the current collector, the positive electrode, and the negative electrode having the doping foil bonded thereto is transported and sandwiched between a predetermined pair of the folded surfaces of the separator.

2 . The apparatus according to claim 1 , wherein
the doping foil bonding control portion controls the operation of the second suction portion so that the doping foil is bonded to the negative electrode sucked and held by the second suction portion, and the doping foil sandwiching control portion controls the operation of the second suction portion so that the negative electrode having the doping foil bonded to the negative electrode is transported and sandwiched between the predetermined pair of the folded surfaces of the separator, thereby manufacturing the multilayer electrode.

3 . The apparatus according to claim 1 , wherein
each of the first suction portion and the second suction portion includes a suction member having a through hole.

4 . The apparatus according to claim 1 , further comprising:
a doping foil roll that a tapelike doping foil member as a material for the doping foil is wrapped around; and a doping foil feeder that feeds the doping foil by drawing the doping foil member from the doping foil roll and by cutting the drawn doping foil member into a predetermined length.

5 . The apparatus according to claim 4 , wherein
the doping foil feeder includes a press-bonding table where the doping foil is pressed against and bonded to the one of the current collector, the positive electrode, and the negative electrode, and the press-bonding table is provided with a non-metallic member that the doping foil is less likely to stick to than to the one of the current collector, the positive electrode, and the negative electrode.

6 . A method for manufacturing a multilayer electrode by alternately sandwiching a sheetlike positive electrode and a sheetlike negative electrode between folded surfaces of a separator each time the separator is folded, and by sandwiching one of a current collector for doping, the positive electrode, and the negative electrode having doping foil bonded thereto between a predetermined pair of the folded surfaces of the separator, the method comprising:
a first sandwiching process that includes sucking and holding one of the positive electrode and the negative electrode, transporting the one of the positive electrode and the negative electrode to a stacking location, and sandwiching the one of the positive electrode and the negative electrode between the folded surfaces of the separator fed to the stacking location; a second sandwiching process that includes sucking and holding the other of the positive electrode and the negative electrode, transporting the other of the positive electrode and the negative electrode to the stacking location, and sandwiching the other of the positive electrode and the negative electrode between the folded surfaces of the separator folded by transportation of the other of the positive electrode and the negative electrode to the stacking location; a bonding process that is performed when a predetermined folded surface of the separator appears and that includes sucking and holding the one of the current collector, the positive electrode, and the negative electrode, transporting the one of the current collector, the positive electrode, and the negative electrode to a bonding location, and bonding the doping foil fed to the bonding location to the one of the current collector, the positive electrode, and the negative electrode; and a third sandwiching process that includes transporting the one of the current collector, the positive electrode, and the negative electrode having the doping foil bonded thereto to the stacking location and sandwiching the one of the current collector, the positive electrode, and the negative electrode having the doping foil bonded thereto between the predetermined pair of the folded surfaces of the separator.

Assignees

• Jtekt Corp

Inventors

• Fuse Masaru
• Suzuki Kazuya
• Fujii Takafumi

Classifications

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title

• B32B37/10 Primary

  characterised by the pressing technique, e.g. using action of vacuum or fluid pressure · CPC title

• H01G11/86

  specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title